I'm trying to add always encrypted to my DB table. But its not allowed to add. I can't select any encryption type. Is there any reason. I'm using SQL Server 2016.
You might have missed previous steps before adding this to a specific column.
Perhaps you need to generate the keys to be used or setting up encryption settings. (Always Encrypted definition)
You might use the ALways Encrypted Wizard
Related
GDPR is causing some headaches in this office. We already have a database table in production, lets call it personal_data, that now requires some columns to be encrypted. We are using SQL Server 2012. I've read that columns can be encrypted and decrypted with a symmetric key stored in the database.
We have dozens of existing queries, stored procedures and views that join to this table, so we'd like to avoid changing them if possible.
Is it possible to encrypt the necessary existing columns and query them without modifying these existing queries?
My thought was that if we renamed the personal_data table to something else, then created a view called personal_data, that queried the personal_data table columns and handled the decryption there, so everything that referenced 'personal_data' would still work as before. But if this is possible, what are the pitfalls with this solution?
I would suggest creating another table, say _personal_data. Encrypt the data in that table and replace the current table with a view on the table that returns acceptable columns.
You can give everyone access to the view, while restricting access to the underlying table.
This is a reasonable interim approach. For GDPR and other privacy initiatives, I prefer stronger restrictions, with personal data being in an entirely separate database -- because that is easier to control access to and to log accesses.
SQL Server 2005 enables developers to encrypt and decrypt sensitive data using EncryptByKey and DecryptByKey functions
You can find a sample case illustrated at SQL Server Database Encryption
But this requires code update for INSERT, UPDATE and READ statements
For example,
SELECT
CONVERT(nvarchar, DecryptByKey(EncryptedData)) AS 'DecryptedData'
FROM myTable;
Instead of direct read as
SELECT EncryptedData AS 'DecryptedData' FROM myTable;
Another encryption method is SQL Server Transparent Data Encryption aka TDE. Once you enable it, you don't need to make any code changes to write and read data. But this is a protection for securing disk files at all not for specific data fields. And once you connect database with a valid connection all data is transparent to you.
This looks a very nice feature, but what I understood its that only the app can see the unencrypted text of the columns, right?
Is it possible that the admin with a SQL query can see the unencrypted data? or does it have to be always from the app?
If yes, can you post a small query to show this
The answer is NO you cannot see encrypted data even if you are the data admin. The admin should not have access to Column Master Key (certificate). You can access it from a client machine that has certificate installed using SSMS or .Net application. Please check the MSDN blog
The new security layer addresses that vulnerability by keeping the
data encrypted even during transactions and computations, and by only
giving the client keys to decrypt it. That means that if anyone else,
including a database or system administrator, tries to access that
client’s database, the credit card information or other sensitive data
would just look like gibberish.
If you are an admin/DBA you can access plaintext data, if you have access to the column master key. To select and decrypt data, you can use any version of SSMS that supports Always Encrypted. Starting with SSMS 17.0, you can also insert, update, and filter by encrypted columns. For more details, please see:
https://msdn.microsoft.com/en-us/library/mt757096.aspx#Anchor_1
https://blogs.msdn.microsoft.com/sqlsecurity/2016/12/13/parameterization-for-always-encrypted-using-ssms-to-insert-into-update-and-filter-by-encrypted-columns/
I m bit new to this field of DBA i wanted to know is there any codes available to encrypt the entire database as we have a huge database maintained in sqlserver 2005 .
I know that it is not safe to encrypt the entire database but we ha such kind of requirement moreover the in the application end they don't want to encrypt it.
i want the process to be as the data comes through the application end into the database it should be encrypted and stored and while retrieving the data it must be decrypted with a certificate/key as provided and shown. I don't want to use any 3rd party tools as it has been instructed.
i searched through the net and found that we can encrypt columns and stored procedure through asymmetric/symmetric key but i need to encrypt the entire database(selected tables is also ok) can you all help me in that.
I don't think there is an easy way to do it in 2005, you would need to redefine all (or most) of your tables to take encrypted data (varbinary) and then you'd lose the ability to do searches and comparisions and a whole heap of other stuff.
For 2008 there is Transparent Data(base) Encryption, which encrypts at the file level (when SQL server writes data) no changes required to your applications.
Search for SQL Server TDE and have a look around.
I have been asked to produce a system that is the middle point in a bunch of systems that handles payments to a small group or people. For it I will be required to store the peoples bank details.
What is a good way of encrypting this data to be stored within the database and then decrypt the data when required to pass onto the next system?
For this project I need to use Microsoft SQL Server.
If you're using SQL Server 2008 the you can use the built in transparent data encryption (TDE). Check out and see if it fits the bill.
I encrypt the values at application level along with an encryption key, and then pass this encrypted value to SQL Server.
When decrypting I pass the encrypted values to the application, and decrypt before using them within the application.
I prefer this method as it keeps the encryption method seperate from SQL Server.
Otherwise, if a user was to hack into your SQL Server, including your encrypted values, and you were using a T-SQL User Defined Function, they would have the ability to decrypt the values, making the encryption worthless.
I have some data in my user database that I would prefer to be encrypted. Most of the data will need to be decrypted when requested, but there are also passwords that can stay encrypted (in the old days we would use pwdcompare but I believe this is obsolete now).
I have followed the steps here, so I have now successfully encrypted my data.
What I don't understand is the correct way to open the master key at runtime, in order to encrypt/decrypt data. If I want to use stored procedures to retrieve encrypted data, how do I go about opening the master key? Do I pass in the master key's password using a stored proc parameter?
As I have understood, you should create master key once (you can do this during installation process) and this is the first and last time password is needed. After that, using master key create encryption key (symmetric or asymmetric) without a password and use it to encrypt/decrypt your data. You don't have to give a password for it, all you need is use your encryption key and have CONTROL permission on it. The only issue is that your DBA can have it too :)
See this article: Using Asymmetric Encryption and Digital Signatures in a SQL Server 2005 Database